"stu-" meaning in Polish

{
  "etymology_templates": [
    {
      "args": {
        "1": "pl",
        "2": "af",
        "3": "pl>sto>hundred",
        "4": "pl>-u->interfix",
        "id": "hundred",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *déḱm̥t\nProto-Indo-European *ḱm̥tóm\nProto-Balto-Slavic *śímta\nProto-Slavic *sъto\nOld Polish sto\nPolish sto\nPolish -u-\nPolish stu-",
      "name": "etymon"
    },
    {
      "args": {
        "1": "pl",
        "2": "sto",
        "3": "-u-"
      },
      "expansion": "sto + -u-",
      "name": "af"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *déḱm̥t\nProto-Indo-European *ḱm̥tóm\nProto-Balto-Slavic *śímta\nProto-Slavic *sъto\nOld Polish sto\nPolish sto\nPolish -u-\nPolish stu-\nFrom sto + -u-.",
  "head_templates": [
    {
      "args": {
        "1": "pl",
        "2": "prefix"
      },
      "expansion": "stu-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "[please"
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Polish entries with Template:pl-pr without syllabification",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Polish entries with etymology trees",
          "parents": [
            "Entries with etymology trees",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Polish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Polish terms interfixed with -u-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "stu- + łeb → stułbia",
          "type": "example"
        }
      ],
      "glosses": [
        "added to mean \"one hundred of\" or imply the object somehow is related to the numeral one hundred"
      ],
      "id": "en-stu--pl-prefix-9nmz~jk0",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/stu/"
    },
    {
      "rhymes": "-u"
    }
  ],
  "word": "stu-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "pl",
        "2": "af",
        "3": "pl>sto>hundred",
        "4": "pl>-u->interfix",
        "id": "hundred",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *déḱm̥t\nProto-Indo-European *ḱm̥tóm\nProto-Balto-Slavic *śímta\nProto-Slavic *sъto\nOld Polish sto\nPolish sto\nPolish -u-\nPolish stu-",
      "name": "etymon"
    },
    {
      "args": {
        "1": "pl",
        "2": "sto",
        "3": "-u-"
      },
      "expansion": "sto + -u-",
      "name": "af"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *déḱm̥t\nProto-Indo-European *ḱm̥tóm\nProto-Balto-Slavic *śímta\nProto-Slavic *sъto\nOld Polish sto\nPolish sto\nPolish -u-\nPolish stu-\nFrom sto + -u-.",
  "head_templates": [
    {
      "args": {
        "1": "pl",
        "2": "prefix"
      },
      "expansion": "stu-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "[please"
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 1 entry",
        "Pages with entries",
        "Polish 1-syllable words",
        "Polish entries with Template:pl-pr without syllabification",
        "Polish entries with etymology trees",
        "Polish entries with incorrect language header",
        "Polish lemmas",
        "Polish prefixes",
        "Polish terms derived from Old Polish",
        "Polish terms derived from Proto-Balto-Slavic",
        "Polish terms derived from Proto-Indo-European",
        "Polish terms derived from Proto-Slavic",
        "Polish terms interfixed with -u-",
        "Polish terms with IPA pronunciation",
        "Rhymes:Polish/u",
        "Rhymes:Polish/u/1 syllable"
      ],
      "examples": [
        {
          "text": "stu- + łeb → stułbia",
          "type": "example"
        }
      ],
      "glosses": [
        "added to mean \"one hundred of\" or imply the object somehow is related to the numeral one hundred"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/stu/"
    },
    {
      "rhymes": "-u"
    }
  ],
  "word": "stu-"
}